EP2374926B1

EP2374926B1 - Washing machine

Info

Publication number: EP2374926B1
Application number: EP09826317.1A
Authority: EP
Inventors: Young Jin Doh
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2008-11-17
Filing date: 2009-11-17
Publication date: 2015-08-19
Anticipated expiration: 2029-11-17
Also published as: WO2010056085A3; EP2374926A2; WO2010056085A2; CN102282307B; EP2374926A4; CN102282307A; US20120017653A1; US9297106B2

Description

BACKGROUND OF THE INVENTION

Field of the invention

The present invention relates to a washing machine equipped with a detergent box having a structure which is used in order to introduce both powered detergents and liquid detergents. More specifically, the present invention relates to a washing machine which allows a user not only to supply powdered detergent mainly used conventionally but also to supply liquid detergent by the simple operation of folding or unfolding an opening and closing partition of the detergent box without installing a separate auxiliary receiving platform for liquid detergent inside the detergent box when the user attempts to use the liquid detergents.

Description of the Related Art

A washing machine is an apparatus for cleaning laundry via washing, rinsing, and dewatering in order to separate dirt from the laundry such as clothes or bedding by using water, detergent and mechanical rotation. The laundry is washed as a washing tub containing the water, detergent, and laundry is rotated by a driving mechanism inside the washing machine.
Inside the washing machine, disposed are a water supply mechanism supplying water to a washing tub, a drainage mechanism draining water inside the washing tub to the outside, and a detergent supply mechanism on a water-supply flow pathway of the water supply mechanism supplying detergents to the inside of the washing tub.
The detergent supply mechanism includes a dispenser connected to the water-supply flow pathway and a detergent box (drawer) for containing various types of detergents, the detergent box being disposed in such a way that the detergent box can be loaded or unloaded to and from the dispenser.
A conventional detergent box has been designed to use powdered detergents; therefore, in order to use liquid detergents, an auxiliary receiving platform in the shape of a cup to receive liquid detergents has to be installed additionally within the detergent box.
In other words, in a partition structure of the detergent box, due to the inherent characteristics of granular and liquid materials, the powdered detergents should be used in an open structure which allows dissolving of powdered detergents in the detergent box while being mixed with water. On the other hand, liquid detergents should be used in an enclosed structure securing the liquid detergents inside the detergent box to prevent leaking before actually being put into the washing tub. Therefore, conventional detergent boxes intended for powdered detergents cannot accommodate a structure allowing both liquid and powdered detergents appropriate for such contradictory detergent holding environments. Due to this reason, an auxiliary receiving platform for putting liquid detergents should be installed additionally to the detergent box in order to use liquid detergents.
GB 2 187 763 A discloses a washing agent flushing-in drawer which has three chambers for detergent-holding units. In the detergent-holding units, a pouring limitation wall having a fixed portion with an overflow window and a pivotal bulkhead partition is disposed. The bulkhead partition is hinged to the fixed portion and is provided with a handle plate so that it can be moved by an operator from a closed position into an open position or vise versa. In the closed position the detergent-holding unit is suitable for filling with liquid detergent. If the bulkhead partition is in its open position, the detergent-holding unit is suitable for filing with powdered detergent. Further, instead of the pivotal bulkhead partition it is also possible to use a partition, which is directly connected with the fixed portion by means of a slide thrust guide mounted at the side walls of the detergent-holding unit. It can be slidingly moved from an upper position, which leaves free the passage underneath the pouring limitation wall into a lower position, in which the passage is sealed in the same manner as when the pivotable bulkhead partition 7 is moved in its closing position.

SUMMARY OF THE INVENTION

The object underlying the present invention is to provide a washing machine comprising a detergent box allowing the user to introduce liquid or powdered detergent, which provides an improved user convenience.
This object is achieved by the washing machine according to claim 1.
The invention has been made in an effort to provide a detergent box allowing the user to introduce liquid or powdered detergent by applying a simple physical operation against an internal structure of the detergent box without installing an additional auxiliary receiving platform for liquid detergents inside the detergent box. By doing so, the invention attempts to provide a washing machine equipped with a detergent box providing convenience for the user to freely use both liquid and powdered detergents without being limited by physical characteristics of employed detergents.
The washing machine of the present invention closes a detergent flow hole by fastening a partitioning member to a guide. If the detergent flow hole is closed, liquid detergents can be stored in the detergent-holding unit. Therefore, the detergent box of the invention can contain not only powdered detergent mainly used conventionally when the partition is partially opened, but also contain and use liquid detergent without installing a separate auxiliary receiving platform for liquid detergents inside the detergent box when the partition is fully closed. Therefore, by using only such a simple modification of a partition, the user can conveniently use both powdered and liquid detergents. In particular, the user can use the liquid detergents without storing the liquid detergents in a separate container. Also, since the user can easily fasten the partitioning member to the guide, user convenience is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded perspective view illustrating a structure of a detergent supply mechanism of a washing machine according to one embodiment of the present invention by opening a top plate;
FIG. 2 is a longitudinal side sectional view illustrating the internal structure of the washing machine of FIG. 1;
FIG. 3 is an exploded perspective view illustrating a detailed structure of a detergent supply mechanism applied to the washing machine of FIG. 1;
FIG. 4 is a perspective view illustrating an embodiment of a detergent box of FIG. 2;
FIG. 5 is a perspective view illustrating one embodiment for fastening a partitioning member to the detergent box of FIG. 4;
FIG. 6 is a perspective view illustrating one embodiment of the partitioning member of FIG. 5;
FIG. 7 is a partial perspective view illustrating the fastening of the partitioning member to the detergent box when a liquid detergent is stored in the detergent box of FIG. 4;
FIG. 8 is a partial perspective view illustrating the fastening of the partitioning member to the detergent box when a powdered detergent is stored in the detergent box of FIG. 4;
FIG. 9 is a perspective view illustrating the fastening of a partitioning member to a detergent box according to another embodiment applied to the washing machine of the present invention;
FIG. 10 is a perspective view illustrating the partitioning member of FIG. 9;
FIG. 11 is a partial perspective view illustrating the fastening of a partitioning member to a detergent box when a liquid detergent is stored in a detergent-holding unit; and
FIG. 12 is a partial perspective view illustrating the fastening of a partitioning member to a detergent box when a powdered detergent is stored in a detergent-holding unit.

DETAILED DESCRIPTION OF THE INVENTION

In what follows, a washing machine according to preferred embodiments of the present invention will be described in detail with reference to the appended drawings.
FIG. 1 is an exploded perspective view illustrating a structure of a detergent supply mechanism D of a washing machine according to one embodiment of the present invention by opening a top plate 13; FIG. 2 is a longitudinal side sectional view illustrating the internal structure of the washing machine of FIG. 1; and FIG. 3 is an exploded perspective view illustrating a detailed structure of a detergent supply mechanism D applied to the washing machine of FIG. 1.
First, with reference to FIGS. 1 and 2, the overall structure of a (drum-type) washing machine according to one embodiment of the present invention will be described.
A washing machine according to the present invention includes a cabinet 10 forming an external appearance; a washing tub 20 being disposed in a rotatable manner inside the cabinet 19 and receiving laundry, detergents, and water; a driving mechanism 23 being connected to the washing tub 20 and driving the washing tub 20; a water supply mechanism 30 supplying water to the washing tub 20; a detergent supply mechanism D receiving water supplied from the water supply mechanism 30 and detergents introduced by the user, mixing them, and providing the mixture to the washing tub 20; and a drainage mechanism 70 draining water contaminated after washing to the outside from the washing tub 20.
A base plate 11 is disposed in a lower part of the cabinet 10; a top plate 13 in an upper part thereof; and a front cover 12 having a control panel 14 for operation of the washing machine on the front surface thereof, altogether forming an external appearance in the shape of a conventional square box.
In the central part of the front cover 12, a laundry entrance hole 22c for loading or unloading laundry to and from the washing tub 20 is formed; and an opening and closing door 16 is installed thereto. Along the periphery of the laundry entrance hole 22c, a gasket 16a is installed for sealing when the door 16 is closed.
Conventionally, in one upper side of the front cover 12, formed is detergent box receiving space 15 for loading and unloading the detergent box 40 to and from the washing machine.
The washing tub 20 includes a tub 21 supported by a damper 21a and springs 21b in such a way to be installed in a shock-absorbing state inside the cabinet 10 and receiving laundry therein, a drum 22 concentrically superimposed on the tub 21 so as to be rotatable within the tub 21 to contain water and detergents therein, and having a plurality of water holes 22a through which the water and detergents inside the tub 21 pass; and a lifter 22b being disposed in the inner surface of the drum 22 and lifting up the laundry up to a predetermined height when the drum 22 is rotated and dropping down the laundry.
The water supply 30 includes a plurality of water supply control valves 31 disposed in the cabinet 10 and connected to an external water source; and a water-supply flow pathway formed between the water supply control valves 31 and the tub 21 to guide water into the tub 21. The water-supply flow pathway includes a plurality of incoming water supply pipes 32 connecting the water supply control valves 31 and the detergent supply mechanism D to each other; and an outgoing water supply pipe 33 connecting the detergent supply D and the tub 21.
Conventionally, the water supply control valve 31 is installed in such a way to penetrate an upper part of a rear surface of the cabinet 10, the water supply control valves 31 includsing a plurality of hot water supply control valves to let in hot water and a plurality of cold water supply control valves to let in cold water.
Between the incoming water supply pipes 32 and the outgoing water supply pipe 33, the detergent supply mechanism D is connected so that detergents can be supplied to the tub 21 together with water supplied through the water supply mechanism 30. In other words, the incoming water supply pipes 32 is installed between the water supply control valves 31 and the detergent supply mechanism D to guide water to the detergent supply mechanism D; a plurality of hot water pipes are disposed between the respective hot water supply control valves and the detergent supply mechanism D while a plurality of cold water pipes are disposed between the respective cold water supply control valves and the detergent supply mechanism D.
The drainage mechanism 70 includes a draining pump 71 providing draining power; a draining guide pipe 72 being connected to a lower part of the tub 21 and collecting and guiding washing water used for washing and rinsing by using the power of the draining pump 71; a draining pipe 73 draining the washing water to the outside; and a draining filter 74 being installed on the draining pipe 73 and filtering residue from washing.
As shown in FIG. 2, the washing machine according to the present invention may further include a separate liquid detergent supply mechanism 60 as means for getting rid of the inconvenience of putting detergent into the detergent box 40 for each washing cycle. That is, the liquid detergent supply mechanism 60 is adapted in such a way that a large amount of detergent is introduced into the detergent box 40 to store a sufficient amount of detergent in a liquid state in a separate liquid detergent storage unit 61 and a fixed amount of detergent is automatically supplied from the liquid detergent storage unit 61 at each laundry cycle. The liquid detergent supply mechanism 60 includes the liquid detergent storage unit 61 for storing at least one liquid detergent supplied to the tub 21 and a liquid detergent supply mechanism 60 for automatically supplying the liquid detergent stored in the liquid detergent storage unit 61 into the tub 21.
The liquid detergent supply mechanism 60 includes a liquid detergent supply pump 62 providing power to supply a liquid detergent into the tub 21, a liquid detergent supply pipe 63 connecting between the liquid detergent storage unit 61 and the tub 21, and a liquid detergent supply connection pipe 64 connecting between the detergent box 40 and the liquid detergent storage unit 61.
Of course, the liquid detergent supply mechanism 60 may have other various configurations. In one example, the liquid detergent supply pipe 63 may be directly connected to the water supply mechanism 30.
By further including the liquid detergent supply mechanism 60 including a separate liquid detergent storage unit 61 as above, the liquid detergent storage unit 61 is connected to the detergent box 40 by the liquid detergent supply connection pipe 64 to allow a liquid detergent to be additionally stored inside the liquid detergent storage unit 61.
As shown in FIGS. 1 to 3, the detergent supply mechanism D includes a dispenser 50 to which the incoming water supply pipes 32 and the outgoing water supply pipe 33 are connected and a detergent box 40 disposed inside the dispenser 50 to be drawn in and out forward and backward and having a detergent-holding unit 42 partitioned off into a plurality of compartments 42a, 42b, 42c, and 42d for separately holding at least one detergent.
As shown in FIG. 3. The dispenser 50 includes a dispenser housing 53, which is installed in the detergent box receiving space 15 of the cabinet 10 (see FIG. 1) and whose front and top are open, a cover for covering the open top of the dispenser housing 53, and a dispenser body 51 mounted in the dispenser housing 53 and the cover 52 and spraying water coming from the incoming water supply pipes 32 to the detergent-holding unit 42 of the detergent box 40.
The dispenser housing 53 has a plurality of space portions 53b and 53c divided into front and rear areas by a partition 53a crossing the interior thereof. A liquid detergent supply opening 53d communicating with the liquid detergent supply connection pipe 64 penetrates the front space portion 53b, and a liquid detergent discharge opening 53e communicating with the outgoing water supply pipe 33 penetrates the rear space portion 53c.
The dispenser body 51 is enclosed with the cover 52 to form a branch flow path 51b, is provided on the rear surface with a plurality of pipe connecting portions 51a connected to ends of the incoming water supply pipes 32, and has a plurality of nozzles 51c formed at the corresponding positions so as to spray water to the respective compartments 42a, 42b, 42c, and 42d of the detergent box 40.
As shown in FIG. 3 , the detergent box 40 is received within the dispenser housing 53 and disposed below the dispenser body 51. The detergent box 40 includes a detergent box body 41 forming the detergent-holding unit 42 and a front cover 41a formed on the front surface of the detergent box body 41. The front cover 41a has a hand grip 41b that allows the user to withdraw the detergent box body 41 and put detergent therein.
The operation of the thus-constructed washing machine according to a preferred embodiment of the present invention will be described below with reference to FIG. 2.
First, laundry is put into the drum 22 via a laundry entrance 22, and the laundry entrance 22c is enclosed with the door 16 and then the washing machine is operated. At this time, the washing machine senses the volume of the laundry put in the drum 22, and sets water level, supply amount of detergent, washing time, and so on.
Then, the water supply mechanism 30 is operated to supply water into a tub 21 until a set water level is reached. In other words, when the water supply control valves 31 of the water supply mechanism 30 are opened, water is introduced from an external water source via the water supply control valves 31, and the water is supplied into the tub 21 along the incoming water supply pipes 32, the detergent supply mechanism D, and the outgoing water supply pipe 33.
At this point, if a detergent has been put in the detergent-holding unit 42 of the detergent box 40, the detergent in the detergent-holding unit 42 is supplied, together with the water supplied from the water supply mechanism 30, into the tub 21.
On the other hand, if no detergent has been put in the detergent-holding unit 42 of the detergent box 40, the separate liquid detergent supply mechanism 50 is operated to supply a liquid detergent into the tub 21 until a set supply amount is reached. That is, when the liquid detergent supply pump 62 of the liquid detergent supply mechanism 60 is operated, the liquid detergent 1 stored in the liquid detergent storage unit 61 is pumped by the liquid detergent supply pump 62, and the liquid detergent 1 flows into the tub 22 along the liquid detergent supply pipe 63.
Once the supply of water and detergent into the tub 21 is finished, the driving mechanism (motor) 23 is operated to rotate the drum 22 for a set period of time. Thus, the laundry in the drum 22 is lifted upward and then dropped downward by the rotation of the drum 22 and the lifter 2b, thereby performing washing.
Once the washing stroke for the laundry is finished, the operation of the driving mechanism 23 is stopped, and then the draining mechanism 70 is operated to drain out the water used for the washing in the tub 21. Next, the water supply mechanism 30 is operated to re-supply water until a set water level is reached, and the driving mechanism 23 is operated to re-rotate the drum 22, thereby performing the rinsing of the laundry.
Once the rinsing stroke for the laundry is finished, the operation of the driving mechanism 23 is stopped, and then the draining mechanism 70 is operated to drain out the water used for the rinsing in the tub 21. Then, when the water is completely drained out of the tub 21, the driving mechanism 23 is operated again to rotate the drum 22 at a high speed, and thereafter the operation of the washing machine is stopped. Once the drum 22 is rotated at a high speed, the water contained in the laundry is discharged to the outside of the drum 22, and the water collected in the tub 21 is drained out by the drainage mechanism 70.
FIG. 4 is a perspective view illustrating another embodiment of a detergent box of FIG. 1. FIG. 5 is a perspective view illustrating one embodiment for fastening a partitioning member 170 to a detergent box 160 of FIG. 4. FIG. 6 is a perspective view illustrating the partitioning member 170 of FIG. 5.
Referring to FIGS. 4 to 6, the detergent box 160 includes a detergent-holding unit 161 for holding liquid detergent or powdered detergent, guides 165 formed at the detergent box 160 and having different heights, and an additive-holding unit 162 for holding additives such as fabric softener or bleaching agent.
The guides 165 are spaced apart from the bottom surface of the detergent-holding unit 161. Also, the guides 165 include a first guide 163 for engaging the partitioning member 170 when a liquid detergent is stored in the detergent-holding unit 161 and a second guide 164 having a different height from the height of the first guide 163, and for engaging the partitioning member 170 when a powdered detergent is contained in the detergent-holding unit 161. The height of the first guide 163 is smaller than the height of the second guide 164.
The partitioning member 170 includes a stopping member 171 for engaging the guides 165 and a body portion 173 for slidably engaging the stopping member and opening and closing the gap between the guides 165 and the bottom surface of the detergent-holding unit 161.
The stopping member 171 slides along the body portion 173 to be engaged with the first guide 163 or the second guide 164. When the stopping member 171 is engaged with the first guide 163, the body portion 173 closes the gap between the guides 165 and the detergent-holding unit 161, and when the stopping member 171 is engaged with the second guide 164, the body portion 173 opens the gap between the guides 165 and the detergent-holding unit 161. Therefore, the position of the stopping member 171 may be changed depending on whether the detergent contained in the detergent-holding unit 161 is liquid or powder, so that the stopping member 171 can be engaged with the first guide 163 or the second guide 164. The flow of washing water when liquid detergent and powdered detergent are stored in the detergent-holding unit will be described later.
The body portion 173 is formed with a stopping member guide 174 that is curved and slidably engages the stopping member 171. As shown in FIG. 7, the stopping member 171 is engaged with the first guide 163, being moved to one side along the stopping member guide 174, and, as shown in FIG. 13, the stopping member 171 is engaged with the second guide 164, being moved to the other side along the stopping member guide 174.
After the position of the stopping member 171 is set by the user when the stopping member 171 is removed from the guides 165, the stopping member guide 174 is curved so as to prevent the stopping member 171 from moving from the set position. As the stopping member 171 has to be fixed at a first position (shown in FIG. 7) corresponding to when engaged with the first guide 163 or at a second position (shown in FIG. 8) corresponding to when engaged with the second guide 164, the stopping member guide 174 is curved twice so as to corresponding to the first position and the second position, respectively.
Moreover, the stopping member 171 is elastically moved to the first or second position due to the curvature, thereby improving operational feeling and user convenience when setting the position of the stopping member 171.
The stopping member 171 may be disposed at different positions by being slid along the stopping member guide 174 formed above the body portion 173 depending on which of liquid and powdered detergents the user wants to put in the detergent-holding unit 161.
Further, the stopping member guide 174 may include an elastic member for fixing the position of the stopping member 171 by elastic force. The elastic member may include a first plate spring corresponding to the first position and a second plate spring corresponding to the second position in order to fix the stopping member 171 at the first or second position.
If the stopping member 171 is set to the first position, the first plate spring is deformed, and the stopping member guide 174 and the stopping member 171 are closely attached to each other by the elastic force generated on this occasion to thus fix the position of the stopping member 171. Likewise, if the stopping member 171 is set to the second position, the second plate spring is deformed, and the stopping member guide 174 and the stopping member 171 are closely attached to each other by the elastic force generated on this occasion to thus fix the position of the stopping member 171.
FIG. 7 is a partial perspective view illustrating the fastening of the partitioning member 170 to the detergent box 160 when a liquid detergent is stored in the detergent-holding unit 161 of FIG. 4. FIG. 8 is a partial perspective view illustrating the fastening of the partitioning member 170 to the detergent box 160 when a powdered detergent is stored in the detergent-holding unit 161 of FIG. 4.
Hereinafter, a method of operating the partitioning member 170 depending on whether the detergent put into the detergent-holding unit 161 is liquid or powder will be described with reference to FIGS. 7 and 8.
When putting a liquid detergent in the detergent-holding unit 161, the user pulls out the detergent box 160 to close the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 by the partitioning member 170. To this end, the user slides the stopping member 171 along the stopping member guide 174 to be placed at the first position (position of the stopping member 171 shown in FIG. 7). An engaging portion 172 is engaged with the first guide 163, with the stopping member 171 being placed at the first position. As such, the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 is closed by the body portion 173.
Afterwards, a liquid detergent is put into the detergent-holding unit 161, and the detergent box 160 is pushed again into the washing machine along the detergent box receiving space 15.
Thereafter, the operation of the washing machine is started, and once water supply is performed by the water supply mechanism 30, washing water is supplied to the detergent box 160. The washing water supplied to the detergent-holding unit 161 is mixed with the liquid detergent. As the supply of the washing water continues, the water level becomes higher and higher. When a predetermined water level is reached, the washing water flows through a hole 173h formed in the body portion 173 and is supplied into the washing tub 20.
Meanwhile, when putting a powdered detergent in the detergent-holding unit 161, the user pulls out the detergent box 160 to open the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 by the partitioning member 170. To this end, the user slides the stopping member 171 along the stopping member guide 174 to be placed at the second position (position of the stopping member 171 shown in FIG. 8). The engaging portion 172 is engaged with the second guide 164, with the stopping member 171 being placed at the second position. As such, the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 is opened by the body portion 173.
Afterwards, a powder detergent is put into the detergent-holding unit 161, and the detergent box 160 is pushed again into the washing machine along the detergent box receiving space 15.
Thereafter, the operation of the washing machine is started, and once water supply is performed by the water supply mechanism 30, washing water is supplied to the detergent box 160. The washing water supplied to the detergent-holding unit 161 is mixed with the powdered detergent and flows along the gap between the guides 165 and the bottom surface of the detergent-holding unit 161, and is supplied into the washing tub 20.
Accordingly, as discussed above, the user is able to easily put a liquid detergent by means of the partitioning member 170 without engaging a separate container for liquid detergent with the detergent box 160. Moreover, it is possible to selectively use liquid detergent or solid detergent by forming the first guide 163 and the second guide 164 with different heights and performing the simple operation of engaging the stopping member 171 with the first guide 163 or the second guide 164 depending on whether the detergent to be put in is liquid or powder, thus offering the advantage of not having to provide a separate liquid detergent supply unit.
Further, the partitioning member 170 is kept mounted to the detergent box 160 all the time regardless of whether the detergent to be put is liquid or powder, thereby eliminating the problem of frequent losses of a separate container conventionally provided for the supply of liquid detergent.
FIG. 9 is a perspective view illustrating the fastening of a partitioning member 270 to a detergent box 160 according to another embodiment applied to the washing machine of the present invention. FIG. 10 is a perspective view illustrating the partitioning member 270 of FIG. 9;
Referring to FIGS. 9 and 10, the detergent box 160 includes a detergent-holding unit 161 for holding liquid detergent or powder detergent, guides 165 formed at the detergent box 160 and having different heights 165, and an additive-holding unit 162 for holding additives such as fabric softener or bleaching agent.
The guides 165 are spaced apart from the bottom surface of the detergent-holding unit 161. Also, the guides 165 include a first guide 163 for engaging the partitioning member 270 when a liquid detergent is stored in the detergent-holding unit 161 and a second guide 164 having a different height from the height of the first guide 163, and for engaging the partitioning member 270 when a powdered detergent is contained in the detergent-holding unit 161. The height of the first guide 163 is smaller than the height of the second guide 164.
The partitioning member 270 includes a stopping member 271 for engaging the guides 165 and a body portion 273 for slidably engaging the stopping member and opening and closing the gap between the guides 165 and the bottom surface of the detergent-holding unit 161.
The stopping member 271 includes a sliding portion 271a that slides along the body portion 273 and engaging portions 272a and 272b that are formed at both sides of the sliding portion 271 and engaged with the guides 165.
The stopping member 271 slides along the body portion 273 to be engaged with the first guide 163 or the second guide 164. When the stopping member 271 is engaged with the first guide 163, the body portion 273 closes the gap between the guides 165 and the detergent-holding unit 161, and when the stopping member 271 is engaged with the second guide 164, the body portion 273 opens the gap between the guides 165 and the detergent-holding unit 161. Therefore, the position of the stopping member 271 may be changed depending on whether the detergent contained in the detergent-holding unit 161 is liquid or powder, so that the stopping member 271 can be engaged with the first guide 163 or the second guide 164. The flow of washing water when liquid detergent and powdered detergent are stored in the detergent-holding unit will be described later.
The body portion 273 is formed with a stopping member guide 174 that is curved and slidably engages the stopping member 271. As shown in FIG. 11, the stopping member 271 engages with the first guide 163, being moved to one side along the stopping member guide 274, and, as shown in FIG. 17, the stopping member 271 is engaged with the second guide 164, being moved to the other side along the stopping member guide 274.
After the position of the stopping member 271 is set by the user when the stopping member 271 is removed from the guides 165, the stopping member guide 274 is curved so as to prevent the stopping member 271 from moving from the set position. As the stopping member 271 has to be fixed at a first position (shown in FIG. 11) corresponding to when engaged with the first guide 163 or at a second position (shown in FIG. 12) corresponding to when engaged with the second guide 164, the stopping member guide 274 is curved twice so as to corresponding to the first position and the second position, respectively.
Moreover, the stopping member 271 is elastically moved to the first or second position due to the curvature, thereby improving operational feeling and user convenience when setting the position of the stopping member 271.
The stopping member 271 may be disposed at different positions by being slid along the stopping member guide 274 formed above the body portion 273 depending on which of liquid and powdered detergents the user wants to put in the detergent-holding unit 161.
Further, the stopping member guide 274 may include an elastic member for fixing the position of the stopping member 271 by elastic force. The elastic member may include a first plate spring corresponding to the first position and a second plate spring corresponding to the second position in order to fix the stopping member 271 at the first or second position.
If the stopping member 271 is set to the first position, the first plate spring is deformed, and the stopping member guide 274 and the stopping member 271 are closely attached to each other by the elastic force generated on this occasion to thus fix the position of the stopping member 271. Likewise, if the stopping member 271 is set to the second position, the second plate spring is deformed, and the stopping member guide 274 and the stopping member 271 are closely attached to each other by the elastic force generated on this occasion to thus fix the position of the stopping member 271.
FIG. 11 is a partial perspective view illustrating the fastening of the partitioning member 270 to the detergent box 160 when a liquid detergent is stored in the detergent-holding unit 161. FIG. 12 is a partial perspective view illustrating the fastening of the partitioning member 270 to the detergent box 160 when a powdered detergent is stored in the detergent-holding unit 161.
Hereinafter, a method of operating the partitioning member 270 depending on whether the detergent put into the detergent-holding unit 161 is liquid or powder will be described with reference to FIGS. 11 and 12.
When putting a liquid detergent in the detergent-holding unit 161, the user pulls out the detergent box 160 to close the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 by the partitioning member 270. To this end, the user slides the stopping member 271 along the stopping member guide 274 to be placed at the first position (position of the stopping member 271 shown in FIG. 11). An engaging portion 272a engages with the first guide 163, with the stopping member 271 being placed at the first position. As such, the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 is closed by the body portion 273.
Afterwards, a liquid detergent is put into the detergent-holding unit 161, and the detergent box 160 is pushed again into the washing machine along the detergent box receiving space 15.
Thereafter, the operation of the washing machine is started, and once water supply is performed by the water supply mechanism 30, washing water is supplied to the detergent box 160. The washing water supplied to the detergent-holding unit 161 is mixed with the liquid detergent. As the supply of the washing water continues, the water level becomes higher and higher. When a predetermined water level is reached, the washing water flows through a hole 273h formed in the body portion 273 and is supplied into the washing tub 20.
Meanwhile, when putting a powdered detergent in the detergent-holding unit 161, the user pulls out the detergent box 160 to open the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 by the partitioning member 270. To this end, the user slides the stopping member 271 along the stopping member guide 274 to be placed at the second position (position of the stopping member 271 shown in FIG. 12). The engaging portion 272 is engaged with the second guide 164, with the stopping member 271 being placed at the second position. As such, the gap between the guides 165 and the bottom surface of the detergent-holding unit 161 is opened by the body portion 273.
Afterwards, a powder detergent is put into the detergent-holding unit 161, and the detergent box 160 is pushed again into the washing machine along the detergent box receiving space 15.
Thereafter, the operation of the washing machine is started, and once water supply is performed by the water supply mechanism 30, washing water is supplied to the detergent box 160. The washing water supplied to the detergent-holding unit 161 is mixed with the powdered detergent and flows along the gap between the guides 165 and the bottom surface of the detergent-holding unit 161, and is supplied into the washing tub 20.
Contrary to the aforementioned sliding type operating method, a method of removing the partitioning member 270 engaged with the first guide 163 and then engaging it with the second guide 164 will be discussed. This method may also apply when the partitioning member 270 engaged with the second guide 164 is removed and engaged with the first guide 163.
The partitioning member 270 according to this embodiment has engaging portions 272a and 272b formed at both sides of the sliding portion 271a. Due to the above structure, the stopping member 271 may be engaged with the guides 165 by either the first engaging portion 272a or the second engaging portion 272b. In an example, the stopping member 271 engaged with the first guide 163 by the first engaging portion 272a can be engaged with the second guide 272 by the simple operation of removing the stopping member 271 from the first guide 163 and then engaging the second engaging portion 272b with the second guide 164.
Accordingly, it is not necessary for the stopping member 271 to have a structure that slides along the stopping member guide 274. Even when the stopping member 271 and the stopping member guide 274 are formed integral with each other, the gap between the guides 165 and the bottom surface of the detergent-holding unit 161can be opened and closed according to the type of detergent, as in the previous embodiments, by selectively engaging the first engaging portion 272a or the second engaging portion 272b with the guides 165 depending on whether the type of detergent to be put in is liquid or powder.
The user is able to easily put a liquid detergent by means of the partitioning member 270 without engaging a separate container for liquid detergent with the detergent box 160. Moreover, it is possible to selectively use liquid detergent or solid detergent by forming the first guide 163 and the second guide 164 with different heights and performing the simple operation of engaging the stopping member 271 with the first guide 163 or the second guide 164 depending on whether the detergent to be put in is liquid or powder, thus offering the advantage of not having to provide a separate liquid detergent supply unit.
Further, the partitioning member 270 is kept mounted to the detergent box 160 all the time regardless of whether the detergent to be put is liquid or powder, thereby eliminating the problem of frequent losses of a separate container conventionally provided for the supply of liquid detergent.
Although the washing machine according to the present invention has been described with reference to the illustrated drawings, it will be apparent to those skilled in the art that the present invention is not intended to be limited to the above-described embodiment and drawings, and various changes or modifications may be made therein. That is to say, the present invention is not limited to a drum type washing machine, but can be applied to a water jet washing machine, etc.
Further, in the present invention, a plurality of liquid detergent storage units may be provided depending on the type of liquid detergent used for washing, and a plurality of liquid detergent supply ports for putting liquid detergent in the liquid detergent storage units may be formed in the detergent box.

Claims

A washing machine comprising:
- a detergent box (160) which is provided in a withdrawable fashion on the water-supply flow pathway of the washing machine, and which is formed with a detergent-holding unit (161) in such a way that it can hold detergent; and

- a partitioning member (170) which closes the detergent-holding unit (161) when a liquid detergent is to be introduced into the detergent-holding unit, and which opens the detergent-holding unit (161) when a powdered detergent is to be introduced into the detergent-holding unit (161);
characterized by guides (165) which are formed at the detergent box (160) to engage the partitioning member (170) and have different heights depending on the engagement position of the partitioning member (170) so as to close or open the detergent-holding unit (161) depending on the engagement position of the partitioning member (170), wherein the guides comprise:

- a first guide (163) for engaging the partitioning member (170) when a liquid detergent is stored in the detergent-holding unit (161); and

- a second guide (164) having a different height from the height of the first guide (163), and for engaging the partitioning member (170) when a powdered detergent is contained in the detergent-holding unit (161).
The washing machine of claim 1, wherein the height of the first guide (163) is smaller than the height of the second guide (164).
The washing machine of claim 1, wherein
- the guides (165) are spaced apart from the bottom surface of the detergent-holding unit (161), and

- the partitioning member (170) closes the gap between the guides (165) and the bottom surface of the detergent-holding unit (161) when engaged with the first guide (163), and opens the gap between the guides and the bottom surface of the detergent-holding unit (161) when engaged with the second guide (164).
The washing machine of claim 3, wherein the partitioning member (170) comprises:
- a stopping member (171) for engaging the guides (165); and

- a body portion (173) which slidably engages the stopping member (171) and closes the gap between the guides (165) and the bottom surface of the detergent-holding unit (161) when the stopping member (171) is engaged with the first guide (163) and opens the gap between the guides (165) and the bottom surface of the detergent-holding unit (161) when the stopping member (171) is engaged with the second guide (164).
The washing machine of claim 4, wherein the body portion (173) has a curved surface along which the stopping member (171) slides.
The washing machine of claim 4, wherein the stopping member (271) comprises:
- a sliding portion (271 a) that slides along the guides (165); and

- engaging portions (272a, 272b) that are formed at both sides of the sliding portion (271a) and engaged with the guides (165).